Physics P1 5.3 Wave properties: reflection.

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What is the normal at a point on a surface?
The normal at a point on a surface is a line drawn perpendicular to the surface.
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How are the angles always measured?
Angles are always measured between the light ray and the normal.
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What does the law of reflection state?
The law of reflection states that the angle of incidence is equal to the angle of reflection.
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What is the image seen in a mirror due to?
The reflection of light.
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What is a flat mirror called?
A plane mirror.
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What is the ray that goes towards the mirror?
The incident ray.
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What is the ray that is coming away from the mirror?
The reflected ray.
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What is the angle between the incident ray and the normal?
The angle of incidence.
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What is the angle between the reflected ray and the normal?
The angle of reflection.
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For any reflected ray, what is the relation in size between the angle of incidence and the angle of reflection?
They are equal.
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What are the features of an image in a plane mirror?
The image is the same size as the object, upright, the same distance behind the mirror as the object is in front and virtual.
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What s a real image?
One that can be formed on a screen because the rays of light that produce the image actually pass through it.
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What is a virtual image?
One that cannot be formed on a screen, because the rays of light that produce the image only appear to pass through it.
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What is the normal?
A line drawn perpendicular to a reflecting surface.
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What size is the image in a plane mirror?
The same size as the object.
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**MAKE SURE THAT YOU UNDERSTAND THE DIFFERENCE BETWEEN A REAL IMAGE AND A VIRTUAL IMAGE**
**PRACTICE DRAWING NEAT DIAGRAMS TO SHOW REFLECTION IN A PLANE MIRROR AND REMEMBER TO PUT ARROWS ON THE RAYS**
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**LOOK UP DIAGRAMS OF THE LAW OF REFLECTION AND IMAGE FORMATION BY A PLANE MIRROR**
**
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Card 2

Front

How are the angles always measured?

Back

Angles are always measured between the light ray and the normal.

Card 3

Front

What does the law of reflection state?

Back

Preview of the front of card 3

Card 4

Front

What is the image seen in a mirror due to?

Back

Preview of the front of card 4

Card 5

Front

What is a flat mirror called?

Back

Preview of the front of card 5
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